- Conditions
- L-theanine
- Interventions
- Theanine, Caffeine, Theanine-Caffeine Combination, Placebo
- Other
- Lead sponsor
- Texas Tech University
- Other
- Eligibility
- 18 Years to 60 Years · Male only
- Enrollment
- 9 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2016
- U.S. locations
- 1
- States / cities
- Lubbock, Texas
Search Results
Search by objective public record fields.
Search by query text, NCT ID, condition, intervention, sponsor, city, state, recruitment status, phase, study type, healthy volunteer eligibility, sex, or age. Results are retrieved from ClinicalTrials.gov and synchronized into the directory. Search pages remain noindex by default.
Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.
Showing 1–11
of 11
matching trials from the live ClinicalTrials.gov search.
Local D1 index available.
- Conditions
- Attention Deficit Hyperactivity Disorder
- Interventions
- L-theanine, Caffeine, L-theanine-Caffeine Combination, Placebo
- Dietary Supplement · Other
- Lead sponsor
- Texas Tech University
- Other
- Eligibility
- 8 Years to 17 Years · Male only
- Enrollment
- 6 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2018
- U.S. locations
- 1
- States / cities
- Lubbock, Texas
- Conditions
- Attention Deficit Hyperactivity Disorder (ADHD), Autism Spectrum Disorder (ASD)
- Interventions
- L-theanine and paraxanthine, Placebo
- Dietary Supplement
- Lead sponsor
- Texas Tech University Health Sciences Center
- Other
- Eligibility
- Male only
- Enrollment
- 24 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2025 – 2026
- U.S. locations
- 1
- States / cities
- Lubbock, Texas
- Conditions
- Cortical Excitability, Psychiatric Disorder
- Interventions
- L-theanine, Placebo
- Drug
- Lead sponsor
- Butler Hospital
- Other
- Eligibility
- 18 Years to 65 Years
- Enrollment
- 11 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2020 – 2021
- U.S. locations
- 1
- States / cities
- Providence, Rhode Island
- Conditions
- Hematopoietic and Lymphatic System Neoplasm, Malignant Solid Neoplasm
- Interventions
- Survey Administration, Theanine
- Other · Drug
- Lead sponsor
- City of Hope Medical Center
- Other
- Eligibility
- 18 Years and older
- Enrollment
- 50 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2026 – 2027
- U.S. locations
- 4
- States / cities
- Duarte, California • Huntington Beach, California • Irvine, California
- Conditions
- Stress
- Interventions
- Theanine Formulation, Placebo
- Dietary Supplement
- Lead sponsor
- Supplement Formulators, Inc.
- Industry
- Eligibility
- 21 Years to 65 Years
- Enrollment
- 14 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2022
- U.S. locations
- 1
- States / cities
- Fort Lauderdale, Florida
- Conditions
- Stress
- Interventions
- Theanine for stress relief formulation, Placebo
- Dietary Supplement
- Lead sponsor
- Supplement Formulators, Inc.
- Industry
- Eligibility
- 21 Years to 65 Years
- Enrollment
- 104 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2023 – 2026
- U.S. locations
- 1
- States / cities
- Fort Lauderdale, Florida
- Conditions
- Theanine, (L)-Isomer
- Interventions
- L-theanine capsule, Placebo capsule
- Dietary Supplement
- Lead sponsor
- The University of Texas Health Science Center, Houston
- Other
- Eligibility
- 18 Years and older
- Enrollment
- 26 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2011 – 2012
- U.S. locations
- 1
- States / cities
- Sugar Land, Texas
- Conditions
- Physical Performance, Exercise Performance, Endurance Exercise, Perceived Exertion, Mood, Energy
- Interventions
- proprietary pre-workout supplement, Control placebo
- Dietary Supplement
- Lead sponsor
- Applied Science & Performance Institute
- Industry
- Eligibility
- 18 Years to 55 Years
- Enrollment
- 27 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2025 – 2026
- U.S. locations
- 1
- States / cities
- Tampa, Florida
- Conditions
- Cognitive Performance
- Interventions
- L-theanine, Caffeine supplement, N1 app
- Drug · Dietary Supplement · Device
- Lead sponsor
- Icahn School of Medicine at Mount Sinai
- Other
- Eligibility
- 18 Years and older
- Enrollment
- 57 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2019 – 2020
- U.S. locations
- 1
- States / cities
- New York, New York
- Conditions
- Physiological Stress
- Interventions
- mental stress task
- Other
- Lead sponsor
- Texas State University
- Other
- Eligibility
- 18 Years to 40 Years
- Enrollment
- 109 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2022 – 2023
- U.S. locations
- 1
- States / cities
- San Marcos, Texas